plastic core for the stationery tape,PE material with protection . 1,This stationery core is for the bopp stationery tape .2,our materia is environmental protection materia 3,Materia :PE4,InsideDiameter :25.25mm Outside Diameter :35mm 5,12mm(11.37mm) 30kgs /bag around 15000pcs /bag 18mm(16.8mm) 30kg/ bag around 10000pcs /bag 10mm (9.7mm) 30kg/bag around 20000pcs/bag 6,packing :use the sack ...